21) If the Hubble's constant for a universe is 15 km/s/Mly. Calculate the distance to a galaxy that has recession velocity of 4.8 x 105 km/s
Q: Pretend that galaxies are spaced evenly, 4.0 Mpc apart, and the average mass of a galaxy is 1.0 x…
A:
Q: 21) If the Hubble's constant for a universe is 25 km/s/Mly. Calculate the distance to a galaxy that…
A: Edwin Hubble discovered through observation that the Universe is expanding. Galaxies are moving away…
Q: A Type la supernova explodes in a galaxy at a distance of 6.10×107 light-years from Earth. If…
A:
Q: 3. The formula for Hubble's Law using the velocity v is valid only for velocities much smaller than…
A: Given data: Redshift z=4.89. The recessional velocity is given as, v=cz+12-1z+12+1 Here, c is the…
Q: Pretend that galaxies are spaced evenly, 8.0 Mpc apart, and the average mass of a galaxy is 1.0 ✕…
A: Average density of the matter in the universe ρavg=M43πd23=6Mπd2
Q: Consider a universe in which the Hubble constant has been measured to have the value H0 = 50…
A: Hubble's law gives the idea that the universe is continuously expanding, and that galaxies are…
Q: If a galaxy is 9.0 Mpc away from Earth and recedes at 488 km/s, what is H0 (in km/s/Mpc)? km/s/Mpc…
A: The question above has been given from Hubble's law. This law is also known as the Hubble-Lemaitre…
Q: Distance to Andromeda galaxy is around 2.538 Mly. Calculate its recessional velocity.
A: Our universe is constantly expanding, It was observed by Edwin Hubble when he saw the galaxies…
Q: The Andromeda Galaxy is a member of the Local Group of galaxies. It is approaching us. Does this…
A: Given Andromeda galaxy is member of the local group of galaxies approaching us. Hubble law Hubble…
Q: (4) The redshift for Galaxy Y is 6.61e-3. What is the galaxy’s velocity (in km/s)? (just enter the #
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Q: A galaxy is 30 Mpc away from us and has a recession velocity of 2000 km.s-1 . What is Hubble’s…
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Q: Recall that Hubbleʹs law is written v = H0d, where v is the recession velocity of a galaxy located a…
A: Given data: Hubble's constant (H0) = 80 km/s/Mpc Distance (d) = 800 Mpc Required: Recession velocity…
Q: If a galaxy is 9.1 Mpc away from Earth and recedes at 511 km/s, what is H0 (in km/s/Mpc)? 2. What…
A: Note: As per the policy, only the first question will be solved. If you want the solution for other…
Q: Suppose that a galaxy has 109 M⊙ of neutral HI gas with a temperature of about 10 K. Estimate the…
A: Given Data: The mass of the galaxy is, M = 109 M Temperature about 10k The luminosity of the 21cm…
Q: Questions/Analysis: 12. Classical Cepheid variables have been observed in other galaxies. What would…
A: Given data, Period of Cepheid T=65 days. Distance of star d=2500000 LY = 766503 parsec.
Q: What are the angular diameters of the following, as seen from Earth? a. The Sun, with radius R =…
A: Given: The radius of the sun is Rsun=7×105 km=7×108 m. The distance of sun from earth Dsun=1 AU…
Q: Hubble law describes how the speed of recession of distant galaxies varies with the distance from…
A: Introduction: Hubble law: It is used for describing the age of the universe since the big bang. It…
Q: A galaxy is found to be receding at a velocity of 3.0 x 104 km-s-1. Calculate the distance to the…
A: Edwin Hubble discovered through observation that the Universe is expanding. Galaxies are moving away…
Q: 6) The redshift of a galaxy is observed to be 1.5. Calculate the recessional velocity of the galaxy.
A: Redshift takes place when the source is moving away from the observer. This reduces the frequency…
Q: If a galaxy is 8.8 Mpc away from Earth and recedes at 498 km/s, what is H0 (in km/s/Mpc)? _______…
A: The required value of Hubble’s constant is, The required value of Hubble time is,
Q: Explain why the universe cannot be older than the Hubble time.
A: Given: To explain universe is not older than the Hubble time as,
Q: 46 Figure 44-12 is a hypothetical plot of the recessional speeds v of galaxies against their…
A:
Q: 5) The recessional velocity of a galaxy is found to be 0.52c. Calculate the redshift.
A: Redshift takes place when the source is moving away from the observer. This reduces the frequency…
Q: Suppose there exists a hypothetical galaxy with mass MG around the center of which a solar system…
A: Given, Mass of Galaxy = 1× 10 40 kg Mass of solar system = 2× 1028 kg Radius = 2.5 × 1020 m We need…
Q: A black hole in the center of a nearby Galaxy has a Schwarzchild radius of 2.0*10^7 km. How many…
A: Given : - A black hole in the center of a nearby Galaxy has a Schwarzschild radius of 2.0*10^7 km…
Q: How the Hubble law allows you to estimate the distances to galaxies? Explain
A: The Hubble's law is important law in astrophysics to measure the distance and velocities of the…
Q: 2) What will be the Hubble constant of a universe with an age of 80 billion years?
A: Edwin Hubble observed that galaxies were moving away from each other instead of coming closer. He…
Q: The critical density of a universe is around 5×10 kg/m³. Estimate the Hubble constant for this…
A: The universe is constantly expanding and cooling down. It began soon after the Big bang when the…
Q: A galaxy has a visible mass of 10 Mo and a flat rotation curve extending to 25 kpc at the level of…
A: From the rotational curve of the Galaxy we have, Ro=25 kpc=25×103 pc It is the distance over which…
Q: Compute the critical density of the universe using the universal gravitational constant G=…
A: The critical density of the universe can be calculated as below,
Q: Problem 6. The average density p of the Universe today is 3 x 10-27kgm-³ 1. Find this density in (a)…
A: Given: Average density of Universe = 3×10-27 kg/m3
Q: 8) Calculate the velocity of a galaxy with a redshift of 0.37.
A: Redshift takes place when the source is moving away from the observer. This reduces the frequency…
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